507 research outputs found

    The Need for Unification and Harmonization in a Maritime Licensing Standard for Recreational Craft

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    The objective of this document is to make clear the importance of simplifying the transit of pleasure boats and their skippers safely in the European territory with the foreseeable improvement of the functioning of the internal market. In many European countries recreational skippers are required to have specific training and experience in order to demonstrate their maritime competence. These licenses for navigation allow a recreational vessel to be skippered in each national territory. One of the main objectives of these qualifications is to reduce the number of accidents in recreational boating. Generally speaking, in the European Union, as regards the requirements for the management of pleasure craft, both private and professional, the requirements are very different depending on the member state

    Reseña/Review (Potter, Will, "Los verdes somos los nuevos rojos: una mirada desde el interior de un movimiento social acosado", Madrid: Plaza y Valdés Editores, ISBN: 9788415271925, 350 págs., 2013)

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    Reseña/Review (Potter, Will, "Los verdes somos los nuevos rojos: una mirada desde el interior de un movimiento social acosado", Madrid: Plaza y Valdés Editores, ISBN: 9788415271925, 350 págs., 2013

    Cryptanalysis of the RSA-CEGD protocol

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    Recently, Nenadi\'c et al. (2004) proposed the RSA-CEGD protocol for certified delivery of e-goods. This is a relatively complex scheme based on verifiable and recoverable encrypted signatures (VRES) to guarantee properties such as strong fairness and non-repudiation, among others. In this paper, we demonstrate how this protocol cannot achieve fairness by presenting a severe attack and also pointing out some other weaknesses.Comment: 8 pages, 1 figur

    Proteoglycans in articular cartilage and their contribution to chondral injury and repair mechanisms

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    Proteoglycans are vital components of the extracellular matrix in articular cartilage, providing biomechanical properties crucial for its proper functioning. They are key players in chondral diseases, specifically in the degradation of the extracellular matrix. Evaluating proteoglycan molecules can serve as a biomarker for joint degradation in osteoarthritis patients, as well as assessing the quality of repaired tissue following different treatment strategies for chondral injuries. Despite ongoing research, understanding osteoarthritis and cartilage repair remains unclear, making the identification of key molecules essential for early diagnosis and effective treatment. This review offers an overview of proteoglycans as primary molecules in articular cartilage. It describes the various types of proteoglycans present in both healthy and damaged cartilage, highlighting their roles. Additionally, the review emphasizes the importance of assessing proteoglycans to evaluate the quality of repaired articular tissue. It concludes by providing a visual and narrative description of aggrecan distribution and presence in healthy cartilage. Proteoglycans, such as aggrecan, biglycan, decorin, perlecan, and versican, significantly contribute to maintaining the health of articular cartilage and the cartilage repair process. Therefore, studying these proteoglycans is vital for early diagnosis, evaluating the quality of repaired cartilage, and assessing treatment effectiveness

    Individual Differences in Dispositional Mindfulness Predict Attentional Networks and Vigilance Performance

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    Acknowledgements The authors wish to thank Tao Coll-Martín, Fernando G. Luna, and Miguel A. Vadillo for the kind and helpful input provided during the development of this research project.Funding Funding for open access charge: Universidad de Granada / CBUA. LC was supported by a doctoral fellowship from “la Caixa” Foundation (ID 100010434; fellowship code LCF/BQ/ DE18/11670002). AC was supported by CIBEROBN, an initiative of the ISCIII (ISC III CB06 03/0052) and Ministerio de Economía y Competitividad (Spain) under AMABLE-VR (RTI2018-097835-A-I00). JL was supported by a research projects grant from the Spanish Agencia Estatal de Investigación, Ministerio de Economía y Competitividad (PSI2017-84926-P; PID2020-114790 GB-I00). This paper is part of the doctoral dissertation of the first author under the supervision of the last author.Data Availability The data and R scripts used for analysis are provided at the Open Science Framework (https://osf.io/374rs/). The online version of the ANTI-Vea task is available for free use and in multiple languages at https://www. ugr. es/~neuro cog/ ANTI/.Supplementary Information The online version contains supplementary material available at https://doi.org/10.1007/s12671-022-01850-6.Pretrial Registration Open Science Framework, https://osf.io/gb6c7Objectives Research addressing the relationship between dispositional mindfulness and objective attention performance remains inconclusive, partly because previous studies used sample sizes possibly leading to underpowered designs. Here, we examined this relationship in a large sample using the ANTI-Vea: a novel cognitive-behavioral task that simultaneously assesses the classic attentional networks—phasic alertness, orienting, executive control—and both the executive and arousal components of vigilance. Methods Two hundred nineteen meditation-naïve participants completed the study. Correlational analyses using Kendall’s Tau were performed between FFMQ scores and ANTI-Vea outcomes. Additional subsidiary correlations were performed between the FFMQ and two self-report measures assessing subjective attentional control and mind-wandering. Benjamini- Hochberg was applied to control de type I error rate. Internal consistency reliability indices were estimated for all measures used to aid the interpretation of the correlational results. Results Higher non-reactivity predicted overall faster reaction times and higher accuracy in attentional networks trials. Higher non-reactivity, as well as higher FFMQ total score, predicted faster reaction time and fewer lapses in arousal vigilance trials, the latter also being negatively associated with describe scores. The magnitude of the correlations ranged from τb = .103 to τb = .119. We found no association between FFMQ scores and executive control or executive vigilance. Conclusions Our results indicate that dispositional mindfulness is linked to improved global attentional and arousal vigilance performance, being non-reactivity to inner experience the key facet driving the association. The absence of association to executive processes is discussed based on the high cognitive demands of the ANTI-Vea task.Universidad de Granada/CBUA“La Caixa” Foundation (ID 100010434; fellowship code LCF/BQ/ DE18/11670002)CIBEROBN, an initiative of the ISCIII (ISC III CB06 03/0052) and Ministerio de Economía y Competitividad (Spain) under AMABLE-VR (RTI2018-097835-A-I00)Spanish Agencia Estatal de Investigación, Ministerio de Economía y Competitividad (PSI2017-84926-P; PID2020-114790 GB-I00

    Wireless Sensor Network Application for Environmental Impact Analysis and Control

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    Traditional Wireless Sensor Networks (WSNs) applications take advantage of the new low cost low power consuming integrated sensors that appear with the evolution of Micro Electromechanical Systems (MEMS). This kind of sensors is suitable for WSNs, due to the reduced size, their interfaces and their low power consumption. However, during the last years, WSNs have found new niches of application where such sensors are not usable, due to the nature of the parameter to be measured. In these scenarios, new approaches must be taken in order to satisfy the requirements. But new problems appear, like cost and size increase. In this paper, an application where parameters like gas concentration, conductivity or pH have to be measured in a coffee factory is presented. The drawbacks of such a solution are highlighted, and the solution in the field of the wireless sensor networks adopted is detailed

    Uso de indicadores bibliométricos para el análisis de temas emergentes y su evolución: spin-offs como caso de estudio

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    [ES] Las spin-offs constituyen una de las áreas de investigación más atractivas, ya que están asociadas con fenómenos como el emprendimiento, la innovación y la transferencia del conocimiento. El presente estudio muestra que la selección y el uso de indicadores bibliométricos permite identificar y caracterizar el desarrollo y la difusión de temas de investigación emergentes como el analizado. Los principales aspectos observados en relación con el desarrollo de la investigación sobre las spin-offs son que se produce un auge en el número de publicaciones después de un largo período de latencia y la marcada naturaleza multidisciplinar del área. El presente enfoque ha analizado la evolución de las publicaciones científicas, los agentes científicos involucrados en las mismas considerando diferentes niveles analíticos, las prácticas cooperativas y las características estructurales de la red de coautorías. Asimismo, se ha analizado la bibliografía citada, la evolución de los indicadores bibliométricos clave, habiéndose efectuado un análisis cualitativo de validación de contenido por parte de un experto en el campo. Se ha determinado el carácter emergente del tema a través de varios indicadores, observando que existe una superposición entre las contribuciones de los autores seminales y el momento en que se convierten en investigadores de referencia en el campo. La antigüedad de la bibliografía citada constituye un destacado indicador para establecer la naturaleza emergente del tema y monitorizar su desarrollo.[EN] Spin-offs are one of the most attractive areas of research; associated with the phenomena of entrepreneurship, innovation, and knowledge transfer. The present study shows that the selection and use of appropriate bibliometric indicators are a highly valuable method for studying emerging topics and analyzing the development and diffusion of the topic under research, including its process of emergence and growth. The primary aspects observed in relation to the development of university spin-off research includes the boom in the number of publications on the topic after a long period of latency and the pronounced multidisciplinary nature of the research. Our approach encompasses the evolution of scientific publication activity in the area, the scientific agents involved with it, and the cooperative practices and structural characteristics of the co-authorship network at different analytical levels. Also, this research explores cited literature, the evolution of key bibliometric indicators, and adds a validating qualitative analysis of content by an expert in the field. Moreover, the emergence of the topic is shown to overlap between seminal authors¿ early research contributions to the topic and the time when they become investigators of reference in the field, with their work featured among the most highly cited documents. Last but not least, the age of the cited bibliography constitutes a prominent indicator for establishing the emerging nature of a topic as well as its stage of development.This work was supported by the Conselleria de Educacion, Investigacion, Cultura y Deporte, Generalitat Valenciana (BEST 2016/153).González-Alcaide, G.; Gorraiz, J.; Hervás Oliver, JL. (2018). On the use of bibliometric indicators for the analysis of emerging topics and their evolution: spin-offs as a case study. El profesional de la información. 27(3):35-52. https://doi.org/10.3145/epi.2018.may.04S355227

    Computing a T-transitive lower approximation or opening of a proximity relation

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    Fuzzy Sets and Systems. IMPACT FACTOR: 1,181. Fuzzy Sets and Systems. IMPACT FACTOR: 1,181. Since transitivity is quite often violated even by decision makers that accept transitivity in their preferences as a condition for consistency, a standard approach to deal with intransitive preference elicitations is the search for a close enough transitive preference relation, assuming that such a violation is mainly due to decision maker estimation errors. In some way, the more number of elicitations, the more probable inconsistency is. This is mostly the case within a fuzzy framework, even when the number of alternatives or object to be classified is relatively small. In this paper we propose a fast method to compute a T-indistinguishability from a reflexive and symmetric fuzzy relation, being T any left-continuous t-norm. The computed approximation we propose will take O(n3) time complexity, where n is the number of elements under consideration, and is expected to produce a T-transitive opening. To the authors¿ knowledge, there are no other proposed algorithm that computes T-transitive lower approximations or openings while preserving the reflexivity and symmetry properties

    La investigación sobre la divulgación de la ciencia en España : Situación actual y retos para el futuro

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    [email protected] [email protected] [email protected] analiza la producción científica española sobre divulgación de la Ciencia como objeto de investigación, identificando los principales agentes científicos, canales de difusión y ámbitos abordados. Se trata de un campo enormemente heterogéneo en el que confluyen diversas disciplinas científicas y propósitos, sobresaliendo los de informar y educar. Se han analizado 286 artículos de revista y 50 tesis doctorales. A partir de la década de los noventa es cuando se produce la eclosión de la investigación, multiplicándose el número de trabajos hasta la actualidad. Se han identificado cinco destacados núcleos temáticos de investigación: periodismo científico, alfabetización científica, lingüística, la divulgación como actividad cultural en el ámbito museístico y la investigación relacionada con determinadas disciplinas, como la Medicina, el Medio Ambiente o la Arqueología.Spanish Scientific Research about Popular Science is analyzed to identify the main scientific agents, dissemination means and subjects in this field. It is an heterogeneous area related to several scientific disciplines and purposes, stand out above them Information and Education. 286 journal articles and 50 PhD Thesis have been analyzed, observing a high increase of publications in 90s remaining until now. The five most important research cores identified are the followings: Science Journalism, Science Literacy, Linguistics and the researches related to Museums and Scientific Disciplines such as Medicine, Environment or Archaeology
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